Posting a bug observation here for general consumption (comments). Will invite Jay Freedman from the Office Answers forum to review and possibly pass to the Word Development team (I'm not holding my breath that it will ever be fixed). The below image and attached .docm file will hopefully illustrate to you what I feel is a bug.
If you wrap a richtext contentcontrol around a table, such that the table is at the very top of the CC range and attempt some seemingly simple VBA steps on the first cell of the table then the CC can be destroyed (obviously not desired). If you step through the macros in the attached I'm guess you will see the same observations (I did this with Word 2010).
NOTE: I didn't want to monkey with you Normal template anymore than necessary so the BB created is deleted but you will get a prompt to save your Normal template.